Workhorse version bump to v8.55.0 to support direct_upload on the new API endpoint

Add loading state to initial load of assignees in dropdown

See merge request gitlab-org/gitlab!47848

Remove zip_pages_deployment feature flag

See merge request gitlab-org/gitlab!47633

Add `user_preferences` table into the list of `HighTrafficTables`

See merge request gitlab-org/gitlab!48223

Async import component that uses eCharts

See merge request gitlab-org/gitlab!48157

Simplify BulkImport concerns

See merge request gitlab-org/gitlab!47923

Work around test failure due to stub_storage_settings issue

See merge request gitlab-org/gitlab!48219

Resolve "Mentioning users is now very slow"

See merge request gitlab-org/gitlab!48217

For some reason, `stub_storage_settings` causes issues with using `dig`.

Closes https://gitlab.com/gitlab-org/gitlab/-/issues/285449

Remove projects created directly under the sandbox group after tests

See merge request gitlab-org/gitlab!48005

Move Terraform state versioning default to database

See merge request gitlab-org/gitlab!48194

Return nil for availability for now due to
https://gitlab.com/gitlab-org/gitlab/-/issues/28544

Introduce Auto Rollback facility

See merge request gitlab-org/gitlab!47159

tooling: Add test for TestLevel#level_for with no prefix for an EE-file

See merge request gitlab-org/gitlab!48130

Removes Security Release Tracking issue template

See merge request gitlab-org/gitlab!48188

Fix cop FactoryBot/InlineAssociation for sent notification

See merge request gitlab-org/gitlab!48153

Add missing metadata to documentation files

See merge request gitlab-org/gitlab!48213

Improve the usage of "this" in the CI ref

See merge request gitlab-org/gitlab!48111

Make sure to use this -> noun, or rephrase. Cleans
up other minor issues surrouding the fixed language
as well

Docs: Add and populate troubleshooting section for triggering pipelines

See merge request gitlab-org/gitlab!48177

Fix intermittent elastic-related specs failures

See merge request gitlab-org/gitlab!48112

And yet more future tense in development docs

See merge request gitlab-org/gitlab!48206

Add redirect file for usage trends topic

See merge request gitlab-org/gitlab!48212

[Feature flag] Remove burnup_charts and iteration_charts

See merge request gitlab-org/gitlab!48097

Add checksum into vulnerability_remediations table

See merge request gitlab-org/gitlab!48165

Fix additional future tense in development docs

See merge request gitlab-org/gitlab!48201

Revert 204720-pghintplan-test

See merge request gitlab-org/gitlab!48208

Replace snake case with camel case

See merge request gitlab-org/gitlab!47966

Update variables to disable autodevops jobs

See merge request gitlab-org/gitlab!41681

Fix future tense in development pages

See merge request gitlab-org/gitlab!48197

It has been decided that we need to investigate other avenues before
settling on pg_hint_plan, so let's clean up for now.

For better code organization define all the Pipeline Attributes within
the `BulkImports::Pipeline::Attributes`.

Allow Pages to define a storage-specific connection

See merge request gitlab-org/gitlab!48098